<!DOCTYPE html>
<html>
<head>
  <meta charset="UTF-8">
  <title>Document</title>
  <style>
    
  </style>
</head>
<body>
  <input type="text" class="username"><br>
  <input type="text" class="password"><br>
  <input type="button" class="btn" value="登录">
</body>
<script>
  
</script>
</html>

<!-- file:///Users/liyang/Desktop/sh2302/day30/login.html -->
<!-- http://localhost:3000/login.html -->